But how did Jack-Jack wind up this way? The baby's mutating powers were a punch line in the original, a side joke that didn't have much effect on the main story until the very end.

There are 14 years between the first Incredibles movie and its new sequel Incredibles 2, but one thing that’s thrilling to see pay off in both films is watching baby Jack-Jack play with his ...

Jack-Jack can traverse through different dimensions. When in the other dimensions (it's implied in the movie there are more than one he travels to), people in his own dimension can still hear him.

In Incredibles 2, Jack-Jack is revealed to be a polymorph, meaning that while some babies are born with several superpowers, Jack-Jack seems to have been born with all the superpowers.